One-form symmetries in N= 3 S- folds {One-form symmetries in $\mathcal{N} = 3$ S-folds}

We classify the global one-form symmetries for non-Lagrangian N = 3 SCFTs that arise by the action of S-fold projections on D3-branes. Such a classification is dictated, on a generic point of the Coulomb branch, by probing the charge spectrum of (p, q)-strings in the brane setup. The charge lattice of lines is then obtained by finding the ones that are genuine modulo screening by dynamical particles. The one-form symmetries are then extracted from the maximal sub-lattices of mutually local lines. We further comment on the existence of non-invertible symmetries for some of these N = 3 SCFTs.